The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 02, 2022
Filed:
Aug. 24, 2018
Deka Products Limited Partnership, Manchester, NH (US);
Michael G. Norris, Manchester, NH (US);
Jacob W. Scarpaci, Manchester, NH (US);
Robert J. Bryant, Jr., Manchester, NH (US);
Geoffrey P. Spencer, Manchester, NH (US);
David J. Hibbard, Bedford, NH (US);
James D. Dale, Nashua, NH (US);
John M. Kerwin, Manchester, NH (US);
Andrew S. Coll, Goffstown, NH (US);
David A. Beavers, Manchester, NH (US);
David W. McGill, Woodstock, GA (US);
Simon C. Helmore, San Francisco, CA (US);
David B. Doherty, Litchfield, NH (US);
Edgar J. Bolton, Newton, NH (US);
Jinsun Yoo, Mountain View, CA (US);
Paul G. Girouard, Allenstown, NH (US);
Daniel S. Karol, Southborough, MA (US);
Daniel B. Singer, Lowell, MA (US);
Joseph P. Rushlow, Goffstown, NH (US);
DEKA Products Limited Partnership, Manchester, NH (US);
Abstract
Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections of an apparatus being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of the diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber.